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ER40/30 Power Supply Transformer 8+8 PinsER40 flyback transformer bobbin, 8+8 pins through hole bobbin, 6 grooves ER40 coil former. Parallel Distance=35.2mm. Pin Pitch=5.0mm. Bobbin size=43.9mmX40.0mmX31.1mm. Phenolic ER40/30 coil bobbin. Samples can be sent for prototype testing.